import React, { Component } from 'react'
// 引入 echarts 核心模块，核心模块提供了 echarts 使用必须要的接口。
import * as echarts from 'echarts/core'
// 引入柱状图图表，图表后缀都为 Chart
import { BarChart } from 'echarts/charts'
// 标签自动布局，全局过渡动画等特性
import { LabelLayout, UniversalTransition } from 'echarts/features'

// 注册必须的组件
echarts.use([
  BarChart,
  LabelLayout,
  UniversalTransition,
])

export default class ColumnCharts extends Component {
  componentDidMount() {
    const myChart = echarts.init(document.querySelector('.column-charts'))
    const option = {
      tooltip: {
          trigger: 'axis',
          axisPointer: {            // 坐标轴指示器，坐标轴触发有效
              type: 'shadow'        // 默认为直线，可选为：'line' | 'shadow'
          }
      },
      legend: {
          data: ['直接访问', '邮件营销', '联盟广告', '视频广告', '搜索引擎', '百度', '谷歌', '必应', '其他']
      },
      grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
      },
      xAxis: [
          {
              type: 'category',
              data: ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
          }
      ],
      yAxis: [
          {
              type: 'value'
          }
      ],
      series: [
          {
              name: '直接访问',
              type: 'bar',
              emphasis: {
                  focus: 'series'
              },
              data: [320, 332, 301, 334, 390, 330, 320]
          },
          {
              name: '邮件营销',
              type: 'bar',
              stack: '广告',
              emphasis: {
                  focus: 'series'
              },
              data: [120, 132, 101, 134, 90, 230, 210]
          },
          {
              name: '联盟广告',
              type: 'bar',
              stack: '广告',
              emphasis: {
                  focus: 'series'
              },
              data: [220, 182, 191, 234, 290, 330, 310]
          },
          {
              name: '视频广告',
              type: 'bar',
              stack: '广告',
              emphasis: {
                  focus: 'series'
              },
              data: [150, 232, 201, 154, 190, 330, 410]
          },
          {
              name: '搜索引擎',
              type: 'bar',
              data: [862, 1018, 964, 1026, 1679, 1600, 1570],
              emphasis: {
                  focus: 'series'
              },
              markLine: {
                  lineStyle: {
                      type: 'dashed'
                  },
                  data: [
                      [{type: 'min'}, {type: 'max'}]
                  ]
              }
          },
          {
              name: '百度',
              type: 'bar',
              barWidth: 5,
              stack: '搜索引擎',
              emphasis: {
                  focus: 'series'
              },
              data: [620, 732, 701, 734, 1090, 1130, 1120]
          },
          {
              name: '谷歌',
              type: 'bar',
              stack: '搜索引擎',
              emphasis: {
                  focus: 'series'
              },
              data: [120, 132, 101, 134, 290, 230, 220]
          },
          {
              name: '必应',
              type: 'bar',
              stack: '搜索引擎',
              emphasis: {
                  focus: 'series'
              },
              data: [60, 72, 71, 74, 190, 130, 110]
          },
          {
              name: '其他',
              type: 'bar',
              stack: '搜索引擎',
              emphasis: {
                  focus: 'series'
              },
              data: [62, 82, 91, 84, 109, 110, 120]
          }
      ]
  }
    myChart.setOption(option)
  }
  render() {
    return (
      <div 
        className="column-charts"
        style={{
          width: '100%',
          minWidth: 800,
          height: '100%'
        }}
      >
      </div>
    )
  }
}
